English verb conjugation
COULD FOUR-WHEEL

Regular verb: four-wheel - four-wheeled - four-wheeled

Affirmation

Simple form	V-ing form
I could four-wheel you could four-wheel he could four-wheel we could four-wheel you could four-wheel they could four-wheel	I could be four-wheeling you could be four-wheeling he could be four-wheeling we could be four-wheeling you could be four-wheeling they could be four-wheeling
Perfect	V-ing perfect
I could have four-wheeled you could have four-wheeled he could have four-wheeled we could have four-wheeled you could have four-wheeled they could have four-wheeled	I could have been four-wheeling you could have been four-wheeling he could have been four-wheeling we could have been four-wheeling you could have been four-wheeling they could have been four-wheeling

Negation

Simple form	V-ing form
I couldn't four-wheel you couldn't four-wheel he couldn't four-wheel we couldn't four-wheel you couldn't four-wheel they couldn't four-wheel	I couldn't be four-wheeling you couldn't be four-wheeling he couldn't be four-wheeling we couldn't be four-wheeling you couldn't be four-wheeling they couldn't be four-wheeling
Perfect	V-ing perfect
I couldn't have four-wheeled you couldn't have four-wheeled he couldn't have four-wheeled we couldn't have four-wheeled you couldn't have four-wheeled they couldn't have four-wheeled	I couldn't have been four-wheeling you couldn't have been four-wheeling he couldn't have been four-wheeling we couldn't have been four-wheeling you couldn't have been four-wheeling they couldn't have been four-wheeling

Interrogative form

Simple form	V-ing form
could I four-wheel? could you four-wheel? could he four-wheel? could we four-wheel? could you four-wheel? could they four-wheel?	could I be four-wheeling? could you be four-wheeling? could he be four-wheeling? could we be four-wheeling? could you be four-wheeling? could they be four-wheeling?
Perfect	V-ing perfect
could I have four-wheeled? could you have four-wheeled? could he have four-wheeled? could we have four-wheeled? could you have four-wheeled? could they have four-wheeled?	could I have been four-wheeling? could you have been four-wheeling? could he have been four-wheeling? could we have been four-wheeling? could you have been four-wheeling? could they have been four-wheeling?

Interro-negative form

Simple form	V-ing form
couldn't I four-wheel? couldn't you four-wheel? couldn't he four-wheel? couldn't we four-wheel? couldn't you four-wheel? couldn't they four-wheel?	couldn't I be four-wheeling? couldn't you be four-wheeling? couldn't he be four-wheeling? couldn't we be four-wheeling? couldn't you be four-wheeling? couldn't they be four-wheeling?
Perfect	V-ing perfect
couldn't I have four-wheeled? couldn't you have four-wheeled? couldn't he have four-wheeled? couldn't we have four-wheeled? couldn't you have four-wheeled? couldn't they have four-wheeled?	couldn't I have been four-wheeling? couldn't you have been four-wheeling? couldn't he have been four-wheeling? couldn't we have been four-wheeling? couldn't you have been four-wheeling? couldn't they have been four-wheeling?